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| Titel |
Integration of remote sensing data and surface observations to estimate the impact of the Russian wildfires over Europe and Asia during August 2010 |
| VerfasserIn |
L. Mei, Y. Xue, G. Leeuw, J. Guang, Y. Wang, Y. Li, H. Xu, L. Yang, T. Hou, X. He, C. Wu, J. Dong, Z. Chen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 12 ; Nr. 8, no. 12 (2011-12-21), S.3771-3791 |
| Datensatznummer |
250006256
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| Publikation (Nr.) |
 copernicus.org/bg-8-3771-2011.pdf |
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| Zusammenfassung |
| A series of wildfires broke out in Western Russia starting in late July of
2010. Harmful particulates and gases released into the local Russian
atmosphere have been reported, as have possible negative consequences for
the global atmosphere. In this study, an extremely hazy area and its
transport trajectory on Russian wildfires were analysed using aerosol
optical depth (AOD) images retrieved via the synergy method from Moderate
Resolution Imaging Spectroradiometer (MODIS) data. In addition, we used
trace gases (NO2 and SO2) and CO2 products measured using
Ozone Monitoring Instrument (OMI) data, vertical distribution of AOD data
retrieved from Cloud-Aerosol Lidar and Infrared Pathfinder Satellite
Observation (CALIPSO) data, the mass trajectory analyses, synoptic maps from
a HYSPLIT model simulation and ground-based data, including AERONET (both
AOD and Ångström exponent) data and PM2.5. First, an Optimal
Smoothing (OS) scheme was used to develop more precise and reliable AOD data
based on multiple competing predictions made using several AOD retrieval
models; then, integrated AOD and PM2.5 data were related using a
chemical transport model (GEOS-Chem), and the integrated AOD and visibility
data were related using the 6S radiative transfer code. The results show
that the PM2.5 concentration is enhanced by a factor of 3–5 as
determined from both satellite and in situ observations with peak daily mean
concentrations of approximately 500 μg m3. Also, the visibility in many
parts of Russia, for instance in Moscow, was less than 100 m; in some areas,
the visibility was less than 50 m. Additionally, the possible impact on
neighbouring countries due to long-transport was analysed for 31 July
and 15 August 2010. A comparison of the satellite aerosol products
and ground observations from the neighbouring countries suggests that
wildfires in Western Russian had little impact on most european and asian
countries, the exceptions being Finland, Estonia, Ukraine and Kyrgyzstan.
However, a possible impact on the Arctic region was identified; such an
effect would have a serious influence on the polar atmospheric enviroment,
and on animals such as polar bears. |
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